In precision circuits validating the performance in the presence of low frequency noise is particularly challenging especially at transistor level, as long simulations are required to observe the low frequency performance. However, running such system level simulations is rarely practical at transistor level as these simulations can take days to weeks to complete. This work presents a high-level model in Python for generating low-frequency noise which can be used for validating the low-frequency performance of a design in a timely manner. Simulation times can be reduced from days to minutes, enabling designers to achieve a high-level simulation coverage. Using Python and NumPy this can be achieved using open-source software tools at no cost.